Improvement in grate-bars for steam-generators



UNITED STATES PATENT OEEICE.

E. G. BLAKSLEE AND A. MANSER, OF SING SING, NEW YORK.

IMPROVEMENT IN GRATE-VBARS FOR STEAM-GENERATORS.

Specification forming part of Letters Patent No. 50,327, dated October l0, 1865.

To all 'whom 'it may concern:

Be it known that we, EBENEZER G. BLAKS- LEE and ALFRED MANsEa, of Sing Sing, in the county of Westchester and State of New York, have invented and made a certain new and useful Improved Feed-later Heater for Boilers, Furnaces, and Steam-Generators; and we do hereby declare the following to be a full, clear, and exact description of our said invention, reference being had to the annexed drawings, making part of this specification, wherein Figure lis a sectional plan of a furnace containing our improvement, `and Fig. 2 is an eleration of the same.

Similar marks of reference denote the same parts.

The nature of our said invention consists in an arrangement ot' feed-water pipes, in combination with hollow or tubular grate-bars,where bythe feed-water is pumped through the gratebars in its passage to the boiler, so as to become fully heated before it reaches said boiler, and when the supply of water is shut off a circulation is maintained of water from the boiler through said tubular grate-bars.

In the drawings, a represents the outline of a re-hox of any desired character; b, a portion ot' the boiler; c, the pipe supplying water to the feed-pump d; e, the pipe from said pump to the check-valvef, which parts, being well known, need no further description.

g g are tubes forming grate-bars. These are connected at their ends to the pipes hand t' by means ot' sleeves or couplings that allow of expansion or contraction, but remain watertight. The tubes L and 'i are formed with partitions, as shown by dotted lines, so that the feed-water as passed into one end of the pipe It is compelled to travel through the entire range of gratebar tubes alternately backward and forward, as indicated by the blue arrows,

and passes through the pipe la into the boiler in a highly-heated state. When the water in the boiler is-high enough, and the feed-water stopped, the cock lin the pipemis to be opened, when acirculation of water will take place from the lower part ol' the boiler b Athrough the range ot' hollow grate-bars in the same direction as the feed-water traveled in passing into the water, and by this arrangement the gratebars will be kept cooler, and the heat conveyed directly from them into the boiler.

a is a cock that may be used asa blow-o when required to empty or partially discharge the contents of the boiler, and o is a cock or Valve in the pipe 7i; that may be provided for shutting off Water from the grate-bars, if required.

A pipe may be provided, as shown by dotted lines in Fig. 2, passing from the check-valve case to the pipe m above the stop-cock l, so that water could be passed directly into the boiler it' so required.

Ordinary grate-bars may be employed in addition to the tubes g, in which case the said tubes g might be at the sides of the furnace, the heating ot' the feed-water and the circulation when shut ot't' being the same as before set forth.

What we claim, and desire to secure by Letters Patent, is-

The tubular water-heaters g, in combination with the pipes k and m and feed-Water pipe e, arranged and operating substantially as specilied.

In witness whereof we have hereunto set our Signatures this Sth of April, 1865.

E. G. BLAKSLEE. ALFRED MANSER.`

Witnesses:

J. MALCOLM SMITH, A LEMUEL W. SEEEELL. 

